DFSMShsm has been accessing the volume with volume serial number volser when it has detected an error in reading the indexed VTOC.
If both return-code and reason-code are equal to zero, DFSMShsm has not been able to process the indexed VTOC for volume volser. The volume either has a disabled indexed VTOC or the volume has a nonindexed VTOC.
For nonzero code values, the return code and CVSTAT field returned to DFSMShsm from the CVAFDSM macro are given in the return-code and reason-code fields. For an explanation of these fields, see information about the CVAFDSM macro. The CVAFDSM return codes are in z/OS DFSMS Using Data Sets. The CVSTAT return codes are in z/OS DFSMSdfp Diagnosis.
DFSMShsm processing continues.
If the return-code and reason-code are nonzero, correct the indexed VTOC using the information about the CVAFDSM macro, which are located in the z/OS DFSMS Macro Instructions for Data Sets.
If both return-code and reason-code are equal to zero and the volume has an indexed VTOC, see the information for previous I/O-error messages (IEC60nI) received for volume volser to see how the indexed VTOC can be reenabled.
If both return-code and reason-code are equal to zero and the volume has a nonindexed VTOC, determine why the available space DSCBs are not usable and make corrections if needed.
DFSMShsm